PART IV: MAINTENANCE
45
RReplacing the ignition electrodes
ATTENTION:
avoid
the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), otherwise the boi-
ler’s operation would be compromised. Check the electrodes position after any intervention on the combustion head.
To replace the ignition electrodes, proceed as
follows:
1 remove the burner cover;
2 loose the nuts that fasten the electrodes
group to the combustion head (A);
3 disconnect the electrodes cables (B);
4 loose the security dowes of the adjusting ring
nut (C);
5 shift the electrodes group back to the outside
and remove the combustion head (D);
6 loose the screw of th eignition electrodes
support (E);
7 remove the electrodes and replace them
paying attention to the measures showed in
figure (F-G);
8 reassemble the burner by fllowing the
procedure in the reversed order.
A
B
C
D
E
F
To replace the electrodes, proceed as follows:
1 remove the burner cover
C;
2 disconnect the electrodes cables;
3 emove the combustion head referring to
paragraph “Removing the combustion head”;
4 unscrew
VE
screws that fasten the
electrodes (see next pictures)
5 remove the electrodes and replace them
referring to the measures indicated in the
previous paragraph;
6 reconnect the electrodes cables;
7 replace the combustion head;
8 replace the burner cover.
V
V
C
